On Minecraft 1.9 Snapshot the 512x textures are buggy. As you can see from the file (screenshot from minecraft) the sword has lines through the sides of it and personally that bugs me a lot. But that's not all. It's not a bug from the past. Because if I go into 1.7.10 the bug is not there, so can you try your best to resolve this issue. It bugs me a whole lot. Maybe in 1.9 you can fix it, just fix it as soon as possible. This is not the same thing as MC-70336. The edges are transparent but just faintly. This has nothing wrong with the texture pack it has something wrong with Minecaft's new 3D models or something around there.

Download Texture Pack: http://www.mediafire.com/download/itdr9a5x9dsxp75/%C2%A75%C2%A7lChicken+n00dles.zip